.container{max-width:600px;margin:0 auto;padding:2rem;text-align:center;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif}h1{color:#333;margin-bottom:1rem}p{color:#666;margin-bottom:2rem}.form{display:flex;flex-direction:column;gap:1rem}input{padding:.8rem;border:1px solid #ddd;border-radius:4px;font-size:1rem}.buttons{display:flex;gap:1rem;justify-content:center;margin-top:1rem}button{padding:.8rem 1.5rem;border:none;border-radius:4px;font-size:1rem;cursor:pointer;transition:background-color .2s;background-color:#4caf50;color:#fff}button:hover{background-color:#45a049}button.unsubscribe{background-color:#f44336}button.unsubscribe:hover{background-color:#da190b}@media (max-width: 480px){.container{padding:1rem}.buttons{flex-direction:column}}.input-help{font-size:.8rem;color:#666;margin:4px 0;text-align:left}